The two teenage boys who will be summoned to court after being accused of putting what police said were homemade explosive devices near the commuter rail tracks in Concord on Tuesday may be faced with more accusations from Bedford. According to Bedford Chief of Police Rob Bongiorno, Bedford Police are currently in the beginning stages of investigating any relationship between the Concord incident and suspicious device that was found in Bedford back in January.

The two teenagers, ages 14 and 15, were summoned in connection with a fire that was started along the commuter rail tracks late Tuesday afternoon. Police dispatch received a 911 call at 4:50 p.m. about a brush fire near the tracks close to the Thoreau Street-Sudbury Road intersection. MBTA Police Superintendent Richard Sullivan said a device was on fire and extinguished by Concord Police. A second device was found near the tracks, Sullivan said, and it was disabled by the MBTA explosives unit.

Transit Police described the device as "a small plastic bottle that contained two liquid chemicals that can be purchased over the counter. When the chemicals interact with one another, over a period of time, they heat up and cause a flash fire."

A similar device was found in Bedford on Jan. 26 when a worker for the Department of Public Works was cleaning culverts along the Minuteman Bikeway and noted a suspicious device, located at a section of the Elm Brook conservation land which crosses the bike path--behind the parking lots at 15 DeAngelo Drive and 140 South Road. Police identified the object as a beer bottle partially filled with liquid with a cloth stopper sticking out of the top.

"We are currently in the preliminary stages of investigating a connection between the incident in Concord and the device found in Bedford," Bongiorno said. "We are working with the Concord Police Department and if we believe the two incidents are connected we will pursue further action."

Concord Journal reporter Henry Schwan and reports from State House News Service contributed to this article.